Swim fin



FIG. 1 is a top, rear, left side perspective view of a swim fin showingmy new design;

FIG. 2 is a bottom, rear, left side perspective view thereof;

FIG. 3 is an enlarged front elevation view thereof;

FIG. 4 is an enlarged rear elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a right side elevation view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines in the drawings illustrate portions of the swim finthat form no part of the claimed design.

CLAIM The ornamental design for a swim fin, as shown and described.